CVE-2025-21700: In the Linux kernel, the following vulnerability has been resolved: net: sched: Disallow replacing of child qdisc from

CVE-2025-21700 is a vulnerability in the Linux kernel's network packet scheduling system where a UAF (use-after-free, a memory error that lets attackers access freed memory) could be triggered by moving a child qdisc (queuing discipline, the Linux component that controls how packets are sent on a network) from one parent to another. The vulnerability allows privilege escalation through a sequence of commands that create conflicting parent-child relationships and cause memory corruption.